<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.bundle.min.js"></script> </head>

<body>
    <p>
        <a class="btn btn-primary" data-toggle="collapse" href="#multiCollapseExample1"
            role="button" aria-expanded="false" aria-controls="multiCollapseExample1">Toggle first element</a>
        <button class="btn btn-primary" type="button" data-toggle="collapse"
            data-target="#multiCollapseExample2" aria-expanded="false"
            aria-controls="multiCollapseExample2">Toggle second element</button>
        <button class="btn btn-primary" type="button" data-toggle="collapse"
            data-target=".multi-collapse" aria-expanded="false" aria-controls="multiCollapseExample1 multiCollapseExample2">Toggle both elements</button>
    </p>
    <div class="row">
        <div class="col">
            <div class="collapse multi-collapse" id="multiCollapseExample1">
                <div class="card card-body">
                    Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus
                    terry richardson ad squid. Nihil anim keffiyeh
                    helvetica, craft beer labore wes anderson
                    cred nesciunt sapiente ea proident.
                </div>
            </div>
        </div>
        <div class="col">
            <div class="collapse multi-collapse" id="multiCollapseExample2">
                <div class="card card-body">
                    Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus
                    terry richardson ad squid. Nihil anim keffiyeh
                    helvetica, craft beer labore wes anderson
                    cred nesciunt sapiente ea proident.
                </div>
            </div>
        </div>
    </div>
</body>

</html>